1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 365 



15. Porites mucrouata Dana. 



Forites nifjresccns, var. mucronata, Daua, Zoophytes, \}. 558, jil. 54, fig. 2, 



184G. 

 Porites mucronata, M. -Edwards, Cor., iii, p. 177, 1860. 

 Sooloo Sea ; U. S. Espl. Exped., 183S-'4'2, types (650,689). 



16. Porites nigrescens Daua, 



Zoophytes, p. 557, pi. 54, fig. 1, 1846. 

 Fiji Islands; U. S. Expl. Exped., 1838-'42, types (090, 6'Jl). 



17. Porites palniata Dana, 



Zoophytes, p. 558, pi. 54, fig. 3, 1846. — Qaelch, Challenger Eeef-Corals, p. 180, 

 1886. 

 Sooloo Sea ; U. S. Expl. Exped., 1838-'42, type (689). 



18. Porites panamensis Verrill, 



Proc. Boston Soc. Nat. Hi*t., x, p. 329, 1866; Trans. Conn. Acad. Arts and Sci., 

 i, part 2, p. 505, 1370. 



Panama ; Sternberg (3972). "* 



The single specimen referred by the writer to this species agrees with 

 the description of Professor Verrill, excepting that the cells are some- 

 what larger, varying from 1 to 1.5™°i in diameter. 



19. Porites Plumieri Duchassaing et Michelotti, 



Siippl. au Mem. sur les Corall. des Antilles, p. 190, lA. x, fig. 14, 1866. 

 St. Thomas, West Indies; U. S. Fish Comm. atr. Albatross, 1884 (15873). 



A single specimen obtained by the steamer Albatross agrees in all par- 

 ticulars with the description and figures of Duchassaing and Michelotti, 

 excepting that the branches do not anastomose. It is i)robably only a 

 Tariety of Porites furcata. 



20. Porites porosa Verrill, (?) 



Trans. Conn. Acad. Arts and Sci., i, jiart 2, p. 504, 1870. 

 La Paz, Lower California; L. Bolding, 1882 (5407,5408). 



21. Porites reticulosa Dana, 



Zoophytes, \}. 567, pi. 56, fig. 3, 1846. 

 Fiji Islands; U. S. Expl. Exped., 1838-'42, types (662,663). 



22. Porites solida Verrill, 



Trans, Conn. Acad. Arts and Sci., i, part 2, p. 358, 1868. 

 Pernambuco, Brazil; C.F. Hartt, 1875 (5362,5365,10963, 15516). 



This species is distributed along the Brazilian coast, from Parahyba 

 do Norte to the Abrolhos Islands, and in some places is very abundant, 

 as near the city of Pernambuco and on the Abrolhos Reefs. It appears 

 to be entirely wanting in the Bay of Bahia, which is rather rich in coral 

 growths. The specimens are generally massive, sometimes incrustiug. 



23. Porites tenuis Verrill, 



Proc. Essex Inst., v, p. 25, 1866. — Quelch, Challenger Reef-Corals, p. 184, 



1886. 

 Loo Choo Islands (?) ; William Stimpson, N. Pacific Expl. Exited., type (407). 



Collected by the "Challenger" at the New Hebrides and Honolulu. 



